ERDDAP > info > bcodmo_dataset_765850

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	[In-situ pump data] - TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017 (Collaborative Research: Are all traps created equal? A multi-method assessment of the collection and detection of sinking particles in the ocean)		F   I   M	background			BCO-DMO	bcodmo_dataset_765850

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt
attribute	NC_GLOBAL	acquisition_description	String	Samples were collected during two deployment cycles (termed \u201cdeployment 1\u201d and \u201cdeployment 2\u201d) occupied during the RRS Discovery cruise DY077 to the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) Site in April 2017 (Figure 1). In each of the cycles, we conducted particle flux sampling method intercomparisons between fluxes derived from upper water column deficits of 234Th vs. its parent isotope 238U, two types of neutrally buoyant sediment traps (NBST and PELAGRA), and a surface tethered array of sediment traps (STT). DY077 samples analyzed in US (WHOI and Skidmore College) are archived here; DY077 samples analyzed in the UK (NOC) are archived in the British Oceanographic Data Centre. Two McLane in-situ battery powered pumps were deployed two times for the collection of size fractionated particles. The water passes first through a 51-micron screen followed by a nominal 1-micron quartz filter. Filter diameters are both 142 mm and a baffled opening developed for the GEOTRACES program keeps particles from washing off the top screen during retrieval of the pumps as they ascend on the wire. The pumps were programmed with a 1-hour delay time before turning on at depths of 200 and 350 m. After a pumping time of 2 hours, the pumps shut off and were retrieved. After retrieval, volumes were noted (measured by dual flow meters), any water that remained in the pump was drained through the filters, and the screen was rinsed with prefiltered seawater onto a 1-\u00b5m pore size silver filter (25-mm diameter). The Ag filter and a 25-mm subsample from the QMA were dried at 45\u00b0C, mounted, and immediately counted for low-level \u03b2 emission onboard the ship. At WHOI, a subset of samples was re-counted approximately one month later on shore. Final background counts to measure non-234Th related \u03b2 emissions were conducted approximately six months later. At this point, filters were unmounted, re-dried, and gravimetrically subdivided into four sections. One half of the filter was analyzed for total carbon and nitrogen after high-temperature combustion on a Thermo Electron FlashEA 1112 C/N analyzer. Coulometric analysis for PIC after sample acidification was performed on a quarter of the filter (Johnson et al, 1985; Honjo et al, 2000). The remainder of the filter was archived. Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49\u00b0N, 16.5\u00b0W).
attribute	NC_GLOBAL	awards_0_award_nid	String	762021
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1659995
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1659995
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	Dr Simone Metz
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51479
attribute	NC_GLOBAL	awards_1_award_nid	String	762029
attribute	NC_GLOBAL	awards_1_award_number	String	OCE-1660012
attribute	NC_GLOBAL	awards_1_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1660012
attribute	NC_GLOBAL	awards_1_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_1_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_1_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_1_program_manager	String	Dr Simone Metz
attribute	NC_GLOBAL	awards_1_program_manager_nid	String	51479
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	In-situ pump data PI: Kenneth Buesseler Data version 2: 2019-06-26
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2019-04-29T16:37:46Z
attribute	NC_GLOBAL	date_modified	String	2019-06-26T19:34:38Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.765850.2
attribute	NC_GLOBAL	Easternmost_Easting	double	-16.4953
attribute	NC_GLOBAL	geospatial_lat_max	double	48.9835
attribute	NC_GLOBAL	geospatial_lat_min	double	48.8656
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-16.4953
attribute	NC_GLOBAL	geospatial_lon_min	double	-16.5907
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	350.0
attribute	NC_GLOBAL	geospatial_vertical_min	double	200.0
attribute	NC_GLOBAL	geospatial_vertical_positive	String	down
attribute	NC_GLOBAL	geospatial_vertical_units	String	m
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/765850
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	CO2 coulometer
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	766332
attribute	NC_GLOBAL	instruments_0_description	String	A CO2 coulometer semi-automatically controls the sample handling and extraction of CO2 from seawater samples. Samples are acidified and the CO2 gas is bubbled into a titration cell where CO2 is converted to hydroxyethylcarbonic acid which is then automatically titrated with a coulometrically-generated base to a colorimetric endpoint.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB12
attribute	NC_GLOBAL	instruments_0_instrument_name	String	CO2 Coulometer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	507
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Coulometer
attribute	NC_GLOBAL	instruments_1_acronym	String	McLane Pump
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	766329
attribute	NC_GLOBAL	instruments_1_description	String	McLane pumps sample large volumes of seawater at depth. They are attached to a wire and lowered to different depths in the ocean. As the water is pumped through the filter, particles suspended in the ocean are collected on the filters. The pumps are then retrieved and the contents of the filters are analyzed in a lab.
attribute	NC_GLOBAL	instruments_1_instrument_name	String	McLane Pump
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	627
attribute	NC_GLOBAL	instruments_2_acronym	String	Riso Beta Counter
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	766330
attribute	NC_GLOBAL	instruments_2_description	String	Low-level beta detectors manufactured by Riso (now Nutech) in Denmark. These instruments accept samples that can be mounted on a 25mm filter holder. These detectors have very low backgrounds, 0.17 counts per minute, and can have counting efficiencies as high as 55%. See: http://cafethorium.whoi.edu/website/about/services_radioanalytical_facility_equip.html and http://www.nutech.dtu.dk/Produkter/Dosimetri/NUK_instruments/GM_multicounter.aspx
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Riso Laboratory Anti-coincidence Beta Counters
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	687
attribute	NC_GLOBAL	instruments_2_supplied_name	String	Riso Beta Counter
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	766331
attribute	NC_GLOBAL	instruments_3_description	String	Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.
attribute	NC_GLOBAL	instruments_3_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB01/
attribute	NC_GLOBAL	instruments_3_instrument_name	String	Elemental Analyzer
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	546339
attribute	NC_GLOBAL	instruments_3_supplied_name	String	Thermo Electron FlashEA 1112 C/N analyzer
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, carbon, chemical, data, dataset, date, date_end, date_start, deployment, depth, dmo, end, erddap, error, inorganic, iso, latitude, longitude, management, oceanography, office, organic, part, particulate, pic, PIC_err, poc, POC_err, pore, pore_size, preliminary, size, start, station, th234, Th234_part, Th234_part_err, time, time_end, time_start, tpc, TPC_err, tpn, TPN_err, volume
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/765850/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/765850
attribute	NC_GLOBAL	Northernmost_Northing	double	48.9835
attribute	NC_GLOBAL	param_mapping	String	{'765850': {'lat': 'master - latitude', 'depth': 'master - depth', 'lon': 'master - longitude', 'ISO_DateTime_start': 'flag - time'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/765850/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	WHOI
attribute	NC_GLOBAL	people_0_person_name	String	Kenneth O. Buesseler
attribute	NC_GLOBAL	people_0_person_nid	String	50522
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	Skidmore College
attribute	NC_GLOBAL	people_1_person_name	String	Margaret L. Estapa
attribute	NC_GLOBAL	people_1_person_nid	String	644830
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Amber York
attribute	NC_GLOBAL	people_2_person_nid	String	643627
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	project	String	Are Traps Equal
attribute	NC_GLOBAL	projects_0_acronym	String	Are Traps Equal
attribute	NC_GLOBAL	projects_0_description	String	NSF Award Abstract: There is considerable need to understand the biological and ecological processes that through net primary production fix dissolved carbon dioxide (CO2) into organic matter in the upper ocean, and the processes that subsequently transport this organic carbon in to the ocean's interior. Most of the particulate organic carbon flux to the deep ocean is thought to be mediated by sinking particles. Ultimately it is the deep organic carbon transport and its sequestration that define the impact of ocean biota on atmospheric CO2 levels and hence climate. Currently, various methods are available to measure the amount of particles in the ocean that sink over a specified period of time commonly referred to as particle flux. Unfortunately, all of these methods are used independently of each other with very little intercomparison, leaving some uncertainty as to which approach provides the most accurate estimates. This study seeks to be the first concerted effort to standardize particle flux measurements. Seeking to keep the cost modest, the researchers are taking advantage of a collaboration with scientists in the United Kingdom to participate in an already scheduled research cruise. The proposed research will have much greater impact that merely standardization of particle flux measurements because it will provide the science and modeling community the ability to quantify the transfer of carbon throughout the surface ocean. Also, this project provides a variety of mentoring and training opportunities for students. A PhD student at Woods Hole Oceanographic Institute will get their first sea-going experience and will learn all of the processing steps for the study of an isotope of thorium (234Th). Skidmore College will have an undergraduate participant in the research and the results from the cruise will also be an excellent additional component for undergraduate oceanography classes. Researchers from Woods Hole Oceanographic Institution and Skidmore College, in collaboration with a scientist from the National Oceanography Centre, Southampton will inter-compare direct, tracer, and optical-sensor methods used to determine sinking particle fluxes in the surface ocean. To do this, they will firstly conduct a comparison of two types of neutrally buoyant traps and one surface-tethered, drifting array. Secondly, measured trap fluxes will be compared to predicted 234Th fluxes from a 3D time-series of data. Lastly, optical sediment trap measurements will be compared to particle size distributions in the water column and gel traps, as well as size-fractionated particles on filters from large volume pumps. With this research, global ocean models, particularly carbon, will have greater accuracy and stronger conclusions will be able to be drawn from them.
attribute	NC_GLOBAL	projects_0_end_date	String	2019-06
attribute	NC_GLOBAL	projects_0_geolocation	String	Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean (49°N, 16.5°W)
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: Are all traps created equal? A multi-method assessment of the collection and detection of sinking particles in the ocean
attribute	NC_GLOBAL	projects_0_project_nid	String	762022
attribute	NC_GLOBAL	projects_0_start_date	String	2017-01
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	48.8656
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017.
attribute	NC_GLOBAL	time_coverage_end	String	2017-04-26T09:15Z
attribute	NC_GLOBAL	time_coverage_start	String	2017-04-19T15:17Z
attribute	NC_GLOBAL	title	String	[In-situ pump data] - TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017 (Collaborative Research: Are all traps created equal? A multi-method assessment of the collection and detection of sinking particles in the ocean)
attribute	NC_GLOBAL	version	String	2
attribute	NC_GLOBAL	Westernmost_Easting	double	-16.5907
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	deployment		byte
attribute	deployment	_FillValue	byte	127
attribute	deployment	actual_range	byte	1, 2
attribute	deployment	bcodmo_name	String	deploy
attribute	deployment	description	String	deployment cycle during cruise DY077
attribute	deployment	long_name	String	Deployment
attribute	deployment	units	String	unitless
variable	station		byte
attribute	station	_FillValue	byte	127
attribute	station	actual_range	byte	38, 88
attribute	station	bcodmo_name	String	station
attribute	station	description	String	station occupied during cruise DY077
attribute	station	long_name	String	Station
attribute	station	units	String	unitless
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	200.0, 350.0
attribute	depth	axis	String	Z
attribute	depth	bcodmo_name	String	depth
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	description	String	depth of water sample collection
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/DEPH/
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	pore_size		byte
attribute	pore_size	_FillValue	byte	127
attribute	pore_size	actual_range	byte	1, 51
attribute	pore_size	bcodmo_name	String	sample_descrip
attribute	pore_size	description	String	nominal pore size of filter used to collect particles
attribute	pore_size	long_name	String	Pore Size
attribute	pore_size	units	String	micrometers (um)
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	48.8656, 48.9835
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	latitude
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	latitude of in-situ pump deployment
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	NaN
attribute	longitude	actual_range	double	-16.5907, -16.4953
attribute	longitude	axis	String	X
attribute	longitude	bcodmo_name	String	longitude
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	longitude of in-situ pump deployment
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	date_start		String
attribute	date_start	bcodmo_name	String	date_utc
attribute	date_start	description	String	date sample collection began (GMT) in ISO 8601 format yyyy-mm-dd
attribute	date_start	long_name	String	Date Start
attribute	date_start	time_precision	String	1970-01-01
attribute	date_start	units	String	unitless
variable	time_start		String
attribute	time_start	bcodmo_name	String	time_utc
attribute	time_start	description	String	time sample collection began (GMT) in ISO 8601 format hh:mm:ss
attribute	time_start	long_name	String	Time Start
attribute	time_start	units	String	unitless
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.49261502E9, 1.4931981E9
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	ISO_DateTime_UTC
attribute	time	description	String	Date time sampling began (GMT) in format yyyy-mm-ddTHH:MMZ
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	ISO Date Time Start
attribute	time	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	time	source_name	String	ISO_DateTime_start
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	time_precision	String	1970-01-01T00:00Z
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	date_end		String
attribute	date_end	bcodmo_name	String	date_utc
attribute	date_end	description	String	date sample collection ended (GMT) in ISO 8601 format yyyy-mm-dd
attribute	date_end	long_name	String	Date End
attribute	date_end	time_precision	String	1970-01-01
attribute	date_end	units	String	unitless
variable	time_end		String
attribute	time_end	bcodmo_name	String	time_utc
attribute	time_end	description	String	time sample collection ended (GMT) in ISO 8601 format hh:mm:ss
attribute	time_end	long_name	String	Time End
attribute	time_end	units	String	unitless
variable	volume		short
attribute	volume	_FillValue	short	32767
attribute	volume	actual_range	short	787, 894
attribute	volume	bcodmo_name	String	sample_descrip
attribute	volume	description	String	water volume filtered by in-situ pump
attribute	volume	long_name	String	Volume
attribute	volume	units	String	liters (L)
variable	TPN		float
attribute	TPN	_FillValue	float	NaN
attribute	TPN	actual_range	float	0.005, 0.056
attribute	TPN	bcodmo_name	String	Total Particulate Nitrogen
attribute	TPN	description	String	total particulate nitrogen concentration
attribute	TPN	long_name	String	TPN
attribute	TPN	units	String	micromoles per liter (umol/L)
variable	TPN_err		float
attribute	TPN_err	_FillValue	float	NaN
attribute	TPN_err	actual_range	float	0.004, 0.007
attribute	TPN_err	bcodmo_name	String	Total Particulate Nitrogen
attribute	TPN_err	description	String	total particulate nitrogen uncertainty. For 51-µm particles is unavailable because blanks were below the analytical detection limit.
attribute	TPN_err	long_name	String	TPN Err
attribute	TPN_err	units	String	micromoles per liter (umol/L)
variable	TPC		float
attribute	TPC	_FillValue	float	NaN
attribute	TPC	actual_range	float	0.039, 0.38
attribute	TPC	bcodmo_name	String	TPC
attribute	TPC	description	String	total particulate carbon concentration
attribute	TPC	long_name	String	TPC
attribute	TPC	units	String	micromoles per liter (umol/L)
variable	TPC_err		float
attribute	TPC_err	_FillValue	float	NaN
attribute	TPC_err	actual_range	float	0.006, 0.03
attribute	TPC_err	bcodmo_name	String	TPC
attribute	TPC_err	description	String	total particulate carbon uncertainty, determined as 3 x SD of blanks, scaled by the volume filtered and fraction of the filter area analyzed. See note in Processing Description regarding QMA punch-to-punch variability.
attribute	TPC_err	long_name	String	TPC Err
attribute	TPC_err	units	String	micromoles per liter (umol/L)
variable	PIC		float
attribute	PIC	_FillValue	float	NaN
attribute	PIC	actual_range	float	0.108, 0.302
attribute	PIC	bcodmo_name	String	PIC
attribute	PIC	description	String	total particulate inorganic carbon concentration
attribute	PIC	long_name	String	Particulate Inorganic Carbon
attribute	PIC	units	String	micrograms per liter (ug/L)
variable	PIC_err		float
attribute	PIC_err	_FillValue	float	NaN
attribute	PIC_err	actual_range	float	0.003, 0.008
attribute	PIC_err	bcodmo_name	String	PIC
attribute	PIC_err	description	String	total particulate inorganic carbon uncertainty, determined as 3 x SD of blanks, scaled by the volume filtered and fraction of the filter area analyzed. See note in Processing Description regarding QMA punch-to-punch variability.
attribute	PIC_err	long_name	String	PIC Err
attribute	PIC_err	units	String	micrograms per liter (ug/L)
variable	POC		float
attribute	POC	_FillValue	float	NaN
attribute	POC	actual_range	float	0.03, 0.36
attribute	POC	bcodmo_name	String	POC
attribute	POC	description	String	total particulate organic carbon concentration, computed as the difference between TPC and PIC
attribute	POC	long_name	String	Particulate Organic Carbon
attribute	POC	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/CORGCAP1/
attribute	POC	units	String	micromoles per liter (umol/L)
variable	POC_err		float
attribute	POC_err	_FillValue	float	NaN
attribute	POC_err	actual_range	float	0.006, 0.03
attribute	POC_err	bcodmo_name	String	POC
attribute	POC_err	description	String	total particulate organic carbon uncertainty, POC_err = (TPC_err2 + PIC_err2)1/2. See note in Processing Description regarding QMA punch-to-punch variability.
attribute	POC_err	long_name	String	POC Err
attribute	POC_err	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/CORGCAP1/
attribute	POC_err	units	String	micromoles per liter (umol/L)
variable	Th234_part		float
attribute	Th234_part	_FillValue	float	NaN
attribute	Th234_part	actual_range	float	0.0117, 0.093
attribute	Th234_part	bcodmo_name	String	thorium-234
attribute	Th234_part	description	String	particulate thorium-234 activity
attribute	Th234_part	long_name	String	Th234 Part
attribute	Th234_part	units	String	disintegration per minute per liter (dpm/L)
variable	Th234_part_err		float
attribute	Th234_part_err	_FillValue	float	NaN
attribute	Th234_part_err	actual_range	float	5.0E-4, 0.003
attribute	Th234_part_err	bcodmo_name	String	thorium-234
attribute	Th234_part_err	description	String	particulate thorium-234 uncertainty, propagated from counting statistics. See note in Processing Description regarding QMA punch-to-punch variability.
attribute	Th234_part_err	long_name	String	Th234 Part Err
attribute	Th234_part_err	units	String	disintegration per minute per liter (dpm/L)

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.